Self-heating soldering iron



Dec. 11, 1923.

W. V. CALLENDER SELF HEATING SOLDERING IRON Filed Nov. 20. 1920 Patented Dec. 11, 1923.

UNiTEo srarss WALLACE V. CALLENDEE, GF CHICAGO, LLINOIS.

SELF-I-IEATNG SOLDERNG IRON.

Application filed November 20, 1920.

To all whom t may concern.'

Be it known that l, 371.7 Atmen V. GALLEN- nnn, a citizen oit the United States, residing at Chicago, in the county ot Cook and State ot Illinois, have invented certain new and usctul improvements in Seltlleating Soldering irons, ot which the 'following` is a specification.

This invention relates to soliti-heating soldering irons, and is desianed primarily tor embodiment in a soldering; iron in which' gaseous tuel is burned as a source of heat.

The object of the invention is to provide a self-heating Evilderingiron which will maintain high heatingefficiency without obstructing any part ot the pyrainidal head of the tool, or adding undue encumbrance to the construction or dimensions oit the tool, or causing` inconvenience in the use ol' the tool.- Accordingly, one Yfeature ot the invention consists in associating,l the heat developing element with a heating' bar cxtending rearwardly trom the working' head et' the solderingl iron, and ot such section and inherent conductivity as will enable it to convey, by conduction and without chokage, sutlicient heat units to keep the head at an eliicient soldering?,- temperature; the heating element together with the rearward extension being kept well within the readwardly projected overall transverse dimensions ot the soldering head so that the device will be restricted to proportions that will enable it to be manipulated with convenience and without detracting from the skill ot the average person Jfamiliar with the use ot a Soldering iron. In the preferred embodiment of the invention` the heat transmitting bar and the heating element will be so re lated that the bar will serveto screen the llame of the burners trom the eyes et the user and thus avoid a Yfrequent source ot annoyance, in gas heated soldering irons.

A further object is to provide a. constructionvol soldering iron that will 'insure cheap and durable assembly as well as eiliciency in transmission and combustion of the iuel. Accordingly, a further feature consists in providing' at the rear end ot". the transmit ting` bar. a connecting` block which is firmly secured to the rear end ot the conducting bar and supports the heating elements in proper relation tothe bar; said block being` hollow and serving as a distributor of the mixture ot fuel and air to the several burners ot the heating element, and also as Serial No. 425,310.

a means for'conneet-ing the rearwardly extending tubular shank in which are em bodied the eras mixer and controlling* valve, and upon which is mounted a suitable handle.

ln the accompanying` drawing, in which two embodiments of the invention are shown by way oit illustrationf lF i gure i is a side elevation, partly in axial section, ot the preferred embodiment ot the device.

Figure 2 a bottom plan view of a portion oil the device shown in Figure l on an enlarged scale..

Figure 3 is a section on the line 3X-3 ot' Figure 2.

Figure 4 shows the front portion of a modified construction of soldering iron; and

Figure 5 is a section on the line x-x of Figure 4t.

l represents the head of the iron which may oli' conventional construction. Extendingl rearwardly 'from the head l is a heat conductinga bar 2 which is oi. sutlicient section. and inherent Vconductivity to convey, by conduction, heat units sutiicient to keep the head l at an efficient soldering temperature. Bar 2 is preferably integral with the head l and ot the same metal, for instance, copper, or brass, or other alloy of copper. Secured to the rear end ot the bar 2, as, for instance, by screws 3, -is a connecting block fl which is preferably ot the saine transverse section as the base of the pyramn idal head l ot the soldering' iron. This head supports the heating element, which preferably consists of a pair ot tubes 5, 5, havingtheir rear ends threaded into the block 4, and prei :ably with their trent ends countersunk in or otherwise seated against the head l. Pertorations through the walls of these tubes 5 which. are presented toward the heating bear 2, permit the escape ot tuel mixture and adapt the tubes to serve as burners in the heating` element. ,ldlock 1l is made hollow, as, for instance by providino` it with a bore er closed by the plug fl-l. or otherwise providinga cavity therein, and is thus adapted to distribute fuel mixture to the burners 5. A combined shank and fuel 'feed conduit (l is tapped into thc block /land has embodied in its construction a suitable air mixer 'I and a controlling cock tl. The rear portion 6"' oit the shank o-r conduit is also provided with a handle S?) oi wood or other non-conductiug material.

Asyvill be better seen from Figures 2 and 3, the conducting bar 2 affords a substantial screen for the llame Jfrom the burners 5, and is thus'not only rendered eiilcient in the absorption of the heat from said burners but serves as an effective screen to intercept light from the llame which might otherwise interfere with proper observation ot the work by the user of the device.

Some of the advantages or' the present inventionmay be realized with a construction such as shown in Figures 4land 5, according to which t-he conducting bar 2 is centrally located with relation to the head l and connecting block 4, and burner tubes 5 are symmetrically distributed around said bar with their jet openings for the escapo offuel directed toward the bar, and with the entire group ot' burners kept well within the overall transverse dimensions ot 'the head and connecting block. In this construction the outer surfaces oit the burner tubes will largely screen the eyes ot the user from the light or" the flame.

I claim:

l. In a soldering iron, a head, a heat transmitting bar extending rearwardly from said head and having a section sutlicient to convey, by conduction7 heat necessary to keep the head at soldering temperature, and

a heating element arranged parallel with said bar and mounted in a position to impart heat to the saine1 said heat transmitting bar and said heating element being located wlthin the rearwardly projecting overall transverse dimensions 01"' said head.

i 2. In a soldering iron7 a head, a heat conducting bar extending rearwardly `from said Y head and having a section sullicient to convey, by conduction, heat necessary to keep the head ata. soldering temperature, a heating element also lying in rear of said head in heating relation to said bar, and a connecting block supporting said bar and heating element; said heating element comprising a plurality of burner tubes; and said block being constructed with a disnibuting chamber supplying fuel to said burner tubes'7 said heat conducting bar. heating element and block being located within the rearwardly projecting overall transverse dimensions ot said head.

4t. ln a .soldering iroin a. head. a heat absorbing bar extending rearwardly troni said head and parallel to the axis thereof. .said bar having;- sullicient capacity ol heat couducton lo tansniit heat to maintain the head at soldering teinlnuature. a connecting block carrying` said bur and the head through the medium ot said bar. and burner tubes arranged parallel with said bar7 in rear ot said heath and supported by said block; said bar and burner tubes being located within the rearwardly projected overall transverse dimensions ot the head.

5. In a soldering iron, a head.y a heat ahsorbing` bar extending rearwardly troni and carrying: said head and having a section su l.'- ticient to convey, by conductioiu heat necessary to keep the head at soldering` temperaturer`7 a connecting block secured to the rear end ol2 said bar. burner tubes` lying in rear ot said head in heating' relation to said bar and supiiorted by said connecting block. said connectng block havingl a fuel supply chamber in communication with said burner tubes. and a combined 'l'uel conduit and handle shank extending` rearwardly l'roni Isaid connectingl block, said heat absorbing bar. block and burner tubes being located within the rearwardly projectingr overall transverse dimensions ot said head.

(3. In a soldering iron`r a head. :i h at absorbing' bar extending rearwardly l'roni said head and adapted to transmit.. by conduction, heat sufficient to keep the head at soldering tempcrature, and a heating element also extending' rearwardly troni the head and in heatin relation to the heat absorbing bar; said heat absorbingbar being adapted to screen the [laine of said heating element.

.7. In a soldering` iron7 a head having :l substantially rectangular base. a heat absorbing bar coextensive with one dimension of the head and extending rearwardly troni one side thereof with suilicient section to conduct heat necessary to keep the head at soldering temperature but leaving a portion of the head offset laterally theretroni, and a. heating element extending rear\\\'ardl v from said offset portion ol: the head iu parallel relation to the heat absorbing bar and in position to have its llame screened by said bar.

iiigned at Chicago. lllinios, this ,ISth day of November. i920,

TALLACE V. )ALL NDllll. 

